Free DART rate calculator
DART rate = (days-away + restricted + transfer cases) × 200,000 ÷ total hours worked. The 200,000 represents 100 full-time workers for a year, so your rate reads as "serious cases per 100 workers". Enter your OSHA 300 log numbers below.
Enter your DART cases and hours to see your rate. Nothing you type leaves your browser.
Common questions
▸What is a good DART rate in construction?
The construction industry DART rate averages around 1.5. Below 1.0 stands out to general contractors and prequal reviewers, and 0 with real hours is the strongest result. Above about 1.6 tends to trigger questions during prequalification.
▸What is the difference between DART and TRIR?
TRIR counts every OSHA-recordable case. DART counts only the more serious subset: cases that involved days away from work, restricted duty, or a job transfer. A high TRIR with a low DART means many minor recordables; a high DART means the injuries you do have are serious. Both use the same per-200,000-hours formula.
▸Where do the DART numbers come from?
From your OSHA 300 log: count the cases marked as days away (column H) plus cases with job restriction or transfer (column I). Total hours worked comes from your OSHA 300A annual summary.
▸Why do prequal portals ask for my DART rate?
DART is a cleaner signal of serious injury frequency than TRIR, so ISNetworld, Avetta, and general contractors use it to screen contractors. A DART rate above the industry benchmark can hold up your prequalification until you explain it and show your safety program.
Prequal portal asking for your safety program with your rates?
ISNetworld, Avetta, and Veriforce all want a written safety program alongside your DART and TRIR. We generate one specific to your trade in minutes for $149.
See the safety programTRIR calculatorEMR impact calculatorOSHA 300 log explainedHow to get on ISNetworld